Granules of fiber-reinforced thermoplastic
AssigneeHoechst Aktiengesellschaft
InventorsDetlef Skaletz, Horst Heckel, Bruno Wagner, Joachim Heydweiller
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Abstract
In granules of fiber-reinforced thermoplastic material, a multiplicity of individual filaments of the reinforcing fiber (e.g. glass) are arranged in parallel in a matrix of the thermoplastic material (e.g. polypropylene). The fiber length corresponds to the granule length and is in the range from 3 mm to 8 mm. The melt viscosity of the thermoplastic material is above 100 Pa.s, the diameter of the granules (measured perpendicular to the fiber direction) is 1.7 to 5 mm and the ratio diameter:length of the granules is 0.4 to 1.66.
Claims19
A granule composed of fiber-reinforced thermoplastic material, in which a multiplicity of individual reinforcing fibers are arranged in parallel in a matrix of the thermoplastic material, and the fiber length corresponds to the granule length and is in the range from 3 mm to 8 mm, the reinforcing fibers having been wetted in a pultrusion process with a thermoplastic melt wherein the melt viscosity of the thermoplastic material is above 100 Pa.s at processing temperature, the diameter of the granule (measured perpendicular to the fiber direction) is 1.7 to 5 mm and the ratio diameter:length of the granule is 0.4 to 1.66.
Dependencies are inferred from the claim text.